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       1                 :            : /*
       2                 :            :  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
       3                 :            :  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
       4                 :            :  * Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
       5                 :            :  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
       6                 :            :  * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
       7                 :            :  * Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
       8                 :            :  * All rights reserved.
       9                 :            :  *
      10                 :            :  * Redistribution and use in source and binary forms, with or without
      11                 :            :  * modification, are permitted provided that the following conditions
      12                 :            :  * are met:
      13                 :            :  * 1. Redistributions of source code must retain the above copyright
      14                 :            :  *    notice, this list of conditions and the following disclaimer.
      15                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      16                 :            :  *    notice, this list of conditions and the following disclaimer in the
      17                 :            :  *    documentation and/or other materials provided with the distribution.
      18                 :            :  * 3. The name of the author may not be used to endorse or promote products
      19                 :            :  *    derived from this software without specific prior written permission.
      20                 :            :  *
      21                 :            :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      22                 :            :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      23                 :            :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      24                 :            :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      25                 :            :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      26                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      27                 :            :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      28                 :            :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      29                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      30                 :            :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      31                 :            :  */
      32                 :            : 
      33                 :            : #include "defs.h"
      34                 :            : 
      35                 :            : #include DEF_MPERS_TYPE(stack_t)
      36                 :            : 
      37                 :            : #include <signal.h>
      38                 :            : 
      39                 :            : #include MPERS_DEFS
      40                 :            : 
      41                 :            : #include "xlat/sigaltstack_flags.h"
      42                 :            : 
      43                 :            : static void
      44                 :         12 : print_stack_t(struct tcb *const tcp, const kernel_ulong_t addr)
      45                 :            : {
      46                 :            :         stack_t ss;
      47                 :            : 
      48         [ +  + ]:         12 :         if (umove_or_printaddr(tcp, addr, &ss))
      49                 :          6 :                 return;
      50                 :            : 
      51                 :          6 :         tprints("{ss_sp=");
      52                 :          6 :         printaddr(ptr_to_kulong(ss.ss_sp));
      53                 :          6 :         tprints(", ss_flags=");
      54                 :          6 :         printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
      55                 :          6 :         tprintf(", ss_size=%" PRI_klu "}", (kernel_ulong_t) ss.ss_size);
      56                 :            : }
      57                 :            : 
      58                 :         12 : SYS_FUNC(sigaltstack)
      59                 :            : {
      60         [ +  + ]:         12 :         if (entering(tcp)) {
      61                 :          6 :                 print_stack_t(tcp, tcp->u_arg[0]);
      62                 :          6 :                 tprints(", ");
      63                 :            :         } else {
      64                 :          6 :                 print_stack_t(tcp, tcp->u_arg[1]);
      65                 :            :         }
      66                 :         12 :         return 0;
      67                 :            : }